Sense 1speed, velocity -- (distance travelled per unit time) => rate -- (a magnitude or frequency relative to a time unit; "they traveled at a rate of 55 miles per hour"; "the rate of change was faster than expected")

Sense 2speed, swiftness, fastness -- (a rate (usually rapid) at which something happens; "the project advanced with gratifying speed") => pace, rate -- (the relative speed of progress or change; "he lived at a fast pace"; "he works at a great rate"; "the pace of events accelerated")

Sense 3speed, speeding, hurrying -- (changing location rapidly) => motion, movement, move -- (the act of changing location from one place to another; "police controlled the motion of the crowd"; "the movement of people from the farms to the cities"; "his move put him directly in my path")

Sense 4focal ratio, f number, stop number, speed -- (the ratio of the focal length to the diameter of a (camera) lens system) => ratio -- (the relative magnitudes of two quantities (usually expressed as a quotient))

Sense 5amphetamine, pep pill, upper, speed -- (a central nervous system stimulant that increases energy and decreases appetite; used to treat narcolepsy and some forms of depression) => stimulant, stimulant drug, excitant -- (a drug that temporarily quickens some vital process) => drug of abuse, street drug -- (a drug that is taken for nonmedicinal reasons (usually for mind-altering effects); drug abuse can lead to physical and mental damage and (with some substances) dependence and addiction)

Sense 3travel rapidly, speed, hurry, zip -- (move very fast; "The runner zipped past us at breakneck speed") => travel, go, move, locomote -- (change location; move, travel, or proceed, also metaphorically; "How fast does your new car go?"; "We travelled from Rome to Naples by bus"; "The policemen went from door to door looking for the suspect"; "The soldiers moved towards the city in an attempt to take it before night fell"; "news travelled fast") Phrasal Verb-> speed up#1

Sense 4speed -- (travel at an excessive or illegal velocity; "I got a ticket for speeding") => travel, go, move, locomote -- (change location; move, travel, or proceed, also metaphorically; "How fast does your new car go?"; "We travelled from Rome to Naples by bus"; "The policemen went from door to door looking for the suspect"; "The soldiers moved towards the city in an attempt to take it before night fell"; "news travelled fast")

Sense 5accelerate, speed, speed up -- (cause to move faster; "He accelerated the car") => change, alter, modify -- (cause to change; make different; cause a transformation; "The advent of the automobile may have altered the growth pattern of the city"; "The discussion has changed my thinking about the issue")